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看板Grad-ProbAsk作者luckyburgess (心安即自在)時間14年前 (2010/02/26 16:10)推噓1(1推 0噓 4→)

留言5則, 4人參與討論串2/3 (看更多)

Consider a 6000rpm disk, which is of one single head, 11tracks, and 110sectors in total. Let the seek time is linearly proportional to the number of track traveled, and to move the head across one track takes 1ms. Suppose that the current head position is at track 0, sector 0. It takes ____ ms to seek to track 10, sector 5. (note that tracks and sectors are numbered from 0) 手邊的解答: disk有6000rpm => 轉一圈需0.01sec 又一track 有10 sectors 所以轉動一圈需0.001sec 故disk head由track 0移動到track 10需10*0.01sec=100ms disk head由sector 0 移動到sector 5 需5*0.001sec=5ms 所以需100+5=105ms 問題: 請問一下它為什麼不需要加translate time(1/2*60*1/6000) ?? 麻煩幫我解答一下感謝!! -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.27.3.226

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EntHeEnd

02/26 16:15, , 1^F

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luckyburgess

02/26 16:30, , 2^F

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bensome0624

02/26 17:27, , 3^F

02/26 17:27, 3^F